javascript - 如何通过 API 调用附加到 WordPress 定制器中的选择框？

Question

我正在开发 WordPress 主题，并且添加了一个选择框以允许用户为其网站选择字体。我想我应该使用 Google Fonts API 来获取字体列表，而不是手动添加所有 900 种字体，但是当我调用 API 时，我无法将返回的数据作为选项附加到选择框中。

这是我的选择框类的 PHP 代码:

    class Customize_Select_Control extends WP_Customize_Control {
        public $type = 'select';

        public function render_content() {
            ?>
            <label>
                <span class="customize-control-title"><?php echo esc_html( $this->label ); ?></span>
                <select <?php $this->link(); ?> id="<?php echo str_replace(' ','-',strtolower(esc_html( $this->label ))); ?>-select">
                    <option value="<?php echo $this->value(); ?>" selected><?php echo $this->value(); ?></option>
                </select>
            </label>
            <?php
        }
    }

然后，我使用以下代码向定制器添加了一个部分、设置和控件:

    // Add Font Section
    $wp_customize->add_section( 'fonts' , array(
        'title' => __( 'Font', 'wordpress' ),
        'priority' => 100,
        'description' => __( 'Pick a font for your website.', 'wordpress' )
    ) );

    // Add the setting & control for the font
    $wp_customize->add_setting( 'font-select' , array(
        'default'   => 'Open Sans',
        'transport' => 'postMessage',
    ) );
    $wp_customize->add_control( new Customize_Select_Control( $wp_customize, 'font-select', array(
        'label'      => __( 'Font', 'wordpress' ),
        'section'    => 'fonts',
        'settings'   => 'font-select',
    ) ) );

以下代码应该将选项附加到选择框:

     $.ajax({
        type: "GET",
        url: "https://www.googleapis.com/webfonts/v1/webfonts?key=[REDACTED]&sort=popularity&fields=items",
        dataType: "json",
        success: function (result, status, xhr){
          console.log(result.items);
          for (var i = 0; i<result.items.length; i++){
            var family = result.items[i].family;
            console.log(family);
            $('#font-select').append(`<option value="${family}">${family}</option>`);
          }
        },
        error: function (xhr, status, error) {
          alert("There was an error loading the Google fonts API: " + status + " " + error + " " + xhr.status + " " + xhr.statusText + "\n\nPlease save your changes and refresh the page to try again.")
        }
      });

如果我将#font-select更改为body，它会很好地附加选项，但无论我尝试将它们附加到选择框，它都不会'不工作。知道我为什么以及如何才能做到这一点吗？

Answer 1

您可以在定制器管理面板的选择框中添加选项值，如下代码:

您的要求的完整代码

• 您只需在脚本中添加您的 google font api key
• 在我使用“twentynineteen”主题 slug 名称的地方，您可以使用您的主题 slug 名称

共有 3 个部分:

1)  function mytheme_customize_register( $wp_customize ) {
        //All our sections, settings, and controls will be added here


        $wp_customize->add_section( 'fonts' , array(
            'title' => __( 'Font', 'twentynineteen' ),
            'priority' => 100,
            'description' => __( 'Pick a font for your website.', 'twentynineteen' )
        ) );

        // Add the setting & control for the font
        $wp_customize->add_setting( 'font-select' , array(
            'type' => 'select',
            'default' => 'Roboto',
            'transport' => 'postMessage',
        ) );

        $wp_customize->add_control(  'font-select', array(
            'type' => 'select',
            'priority' => 10, // Within the section.
            'section' => 'core', // Required, core or custom.
            'description' => __( 'This is a date control with a red border.' ),
            'choices' => array( // Optional.
            'wordpress' => __( 'Roboto' ),
            'hamsters' => __( 'Lato' ),
            'jet-fuel' => __( 'Muli' ),

        ),
            'label'      => __( 'Font', 'twentynineteen' ),
            'section'    => 'fonts',
            'settings'   => 'font-select',
        )  );

     }
     add_action( 'customize_register', 'mytheme_customize_register' );

现在添加脚本文件

2) function add_font_scripts(){

  wp_enqueue_script('custom_js_script', get_bloginfo('template_url').'/js/custom-scripts.js', array('jquery'));
}
add_action( 'admin_enqueue_scripts', 'add_font_scripts' );

现在最后一步，请在此文件 custom-scripts.js 中添加以下脚本，我们刚刚在上面排队

3)  var $= jQuery;
$(document).ready(function(){


    $.ajax({
        type: "GET",

        url: "https://www.googleapis.com/webfonts/v1/webfonts?key=apikey&sort=popularity&fields=items",
        dataType: "json",

        success: function (result, status, xhr){
            var outputstate = [];
          console.log(result.items);
          for (var i = 0; i<result.items.length; i++){
            var family = result.items[i].family;
            console.log(family);

           outputstate.push('<option value="'+ family +'">'+ family +'</option>');
           $('#_customize-input-font-select').html(outputstate.join(''));
          }
        },
        error: function (xhr, status, error) {
          alert("There was an error loading the Google fonts API: " + status + " " + error + " " + xhr.status + " " + xhr.statusText + "\n\nPlease save your changes and refresh the page to try again.")
        }


        });
    });

我已经尝试过这段代码，它工作正常!

希望这篇文章对您有所帮助!